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335 lines
9.0 KiB
C++
335 lines
9.0 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//
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// A Fixed-allocation class for maintaining a 1d or 2d or 3d array of data in a structure-of-arrays
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// (SOA) sse-friendly manner.
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// =============================================================================//
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#ifndef UTLSOACONTAINER_H
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#define UTLSOACONTAINER_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier0/platform.h"
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#include "tier0/dbg.h"
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#include "tier0/threadtools.h"
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#include "tier1/utlmemory.h"
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#include "tier1/utlblockmemory.h"
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#include "mathlib/ssemath.h"
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// strided pointers. gives you a class that acts like a pointer, but the ++ and += operators do the
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// right thing
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template<class T> class CStridedPtr
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{
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protected:
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T *m_pData;
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size_t m_nStride;
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public:
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FORCEINLINE CStridedPtr<T>( void *pData, size_t nByteStride )
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{
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m_pData = reinterpret_cast<T *>( pData );
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m_nStride = nByteStride / sizeof( T );
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}
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FORCEINLINE CStridedPtr<T>( void ) = default;
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T *operator->(void) const
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{
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return m_pData;
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}
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T & operator*(void) const
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{
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return *m_pData;
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}
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FORCEINLINE operator T *(void)
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{
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return m_pData;
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}
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FORCEINLINE CStridedPtr<T> & operator++(void)
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{
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m_pData += m_nStride;
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return *this;
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}
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FORCEINLINE void operator+=( size_t nNumElements )
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{
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m_pData += nNumElements * m_nStride;
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}
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};
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template<class T> class CStridedConstPtr
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{
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protected:
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const T *m_pData;
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size_t m_nStride;
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public:
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FORCEINLINE CStridedConstPtr<T>( void const *pData, size_t nByteStride )
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{
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m_pData = reinterpret_cast<T const *>( pData );
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m_nStride = nByteStride / sizeof( T );
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}
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FORCEINLINE CStridedConstPtr<T>( void ) = default;
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const T *operator->(void) const
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{
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return m_pData;
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}
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const T & operator*(void) const
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{
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return *m_pData;
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}
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FORCEINLINE operator const T *(void) const
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{
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return m_pData;
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}
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FORCEINLINE CStridedConstPtr<T> &operator++(void)
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{
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m_pData += m_nStride;
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return *this;
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}
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FORCEINLINE void operator+=( size_t nNumElements )
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{
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m_pData += nNumElements*m_nStride;
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}
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};
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// allowed field data types. if you change these values, you need to change the tables in the .cpp file
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enum EAttributeDataType
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{
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ATTRDATATYPE_FLOAT = 0, // a float attribute
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ATTRDATATYPE_4V = 1, // vector data type, stored as class FourVectors
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ATTRDATATYPE_INT = 2, // integer. not especially sse-able on
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// all architectures.
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ATTRDATATYPE_POINTER = 3, // a pointer.
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ATTRDATATYPE_NONE = -1, // pad and varargs ender
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};
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#define MAX_SOA_FIELDS 32
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class CSOAContainer
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{
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protected:
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int m_nColumns; // # of rows and columns created with
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int m_nRows;
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int m_nSlices;
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int m_nPaddedColumns; // # of columns rounded up for sse
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int m_nNumQuadsPerRow; // # of groups of 4 elements per row
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uint8 *m_pDataMemory; // the actual data memory
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uint8 *m_pAttributePtrs[MAX_SOA_FIELDS];
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EAttributeDataType m_nDataType[MAX_SOA_FIELDS];
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size_t m_nStrideInBytes[MAX_SOA_FIELDS]; // stride from one field datum to another
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size_t m_nRowStrideInBytes[MAX_SOA_FIELDS]; // stride from one row datum to another per field
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size_t m_nSliceStrideInBytes[MAX_SOA_FIELDS]; // stride from one slice datum to another per field
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uint32 m_nFieldPresentMask;
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FORCEINLINE void Init( void )
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{
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memset( m_nDataType, 0xff, sizeof( m_nDataType ) );
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m_pDataMemory = 0;
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m_nColumns = m_nPaddedColumns = m_nRows = m_nSlices = 0;
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m_nFieldPresentMask = 0;
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}
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public:
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CSOAContainer( void ) // an empoty one with no attributes
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{
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Init();
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}
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void Purge( void ); // set back to un-initted state, freeing memory
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~CSOAContainer( void );
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// easy constructor for 2d using varargs. call like
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// #define ATTR_RED 0
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// #define ATTR_GREEN 1
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// #define ATTR_BLUE 2
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// CSOAContainer myimage( 256, 256, ATTR_RED, ATTRDATATYPE_FLOAT, ATTR_GREEN, ATTRDATATYPE_FLOAT,
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// ATTR_BLUE, ATTRDATATYPE_FLOAT, -1 );
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CSOAContainer( int nCols, int nRows, ... );
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size_t ElementSize( void ) const; // total bytes per element. not super fast.
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// set the data type for an attribute. If you set the data type, but tell it not to allocate,
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// the data type will be set but writes will assert, and reads will give you back zeros.
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FORCEINLINE void SetAttributeType( int nAttrIdx, EAttributeDataType nDataType, bool bAllocateMemory = true )
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{
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Assert( !m_pDataMemory ); // can't change after memory allocated
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Assert( nAttrIdx < MAX_SOA_FIELDS );
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m_nDataType[nAttrIdx] = nDataType;
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if ( ( m_nDataType[nAttrIdx] != ATTRDATATYPE_NONE ) && bAllocateMemory )
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m_nFieldPresentMask |= ( 1 << nAttrIdx );
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else
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m_nFieldPresentMask &= ~( 1 << nAttrIdx );
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}
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FORCEINLINE int NumRows( void ) const
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{
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return m_nRows;
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}
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FORCEINLINE int NumCols( void ) const
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{
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return m_nColumns;
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}
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FORCEINLINE int NumSlices( void ) const
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{
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return m_nSlices;
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}
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FORCEINLINE void AssertDataType( int nAttrIdx, EAttributeDataType nDataType ) const
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{
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Assert( nAttrIdx >= 0 );
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Assert( nAttrIdx < MAX_SOA_FIELDS );
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Assert( m_nStrideInBytes[nAttrIdx] );
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}
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// # of groups of 4 elements per row
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FORCEINLINE int NumQuadsPerRow( void ) const
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{
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return m_nNumQuadsPerRow;
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}
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FORCEINLINE int Count( void ) const // for 1d data
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{
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return NumCols();
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}
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FORCEINLINE int NumElements( void ) const
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{
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return NumCols() * NumRows() * NumSlices();
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}
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// how much to step to go from the end of one row to the start of the next one. Basically, how
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// many bytes to add at the end of a row when iterating over the whole 2d array with ++
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FORCEINLINE size_t RowToRowStep( int nAttrIdx ) const
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{
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return 0;
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}
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FORCEINLINE void *RowPtr( int nAttributeIdx, int nRowNumber, int nSliceNumber = 0 ) const
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{
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Assert( nRowNumber < m_nRows );
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Assert( nAttributeIdx < MAX_SOA_FIELDS );
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Assert( m_nDataType[nAttributeIdx] != ATTRDATATYPE_NONE );
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Assert( m_nFieldPresentMask & ( 1 << nAttributeIdx ) );
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return m_pAttributePtrs[nAttributeIdx] +
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+ nRowNumber * m_nRowStrideInBytes[nAttributeIdx]
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+ nSliceNumber * m_nSliceStrideInBytes[nAttributeIdx];
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}
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FORCEINLINE void const *ConstRowPtr( int nAttributeIdx, int nRowNumber, int nSliceNumber = 0 ) const
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{
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Assert( nRowNumber < m_nRows );
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Assert( nAttributeIdx < MAX_SOA_FIELDS );
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Assert( m_nDataType[nAttributeIdx] != ATTRDATATYPE_NONE );
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return m_pAttributePtrs[nAttributeIdx]
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+ nRowNumber * m_nRowStrideInBytes[nAttributeIdx]
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+ nSliceNumber * m_nSliceStrideInBytes[nAttributeIdx];
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}
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template<class T> FORCEINLINE T *ElementPointer( int nAttributeIdx,
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int nX = 0, int nY = 0, int nZ = 0 ) const
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{
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Assert( nAttributeIdx < MAX_SOA_FIELDS );
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Assert( nX < m_nColumns );
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Assert( nY < m_nRows );
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Assert( nZ < m_nSlices );
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Assert( m_nDataType[nAttributeIdx] != ATTRDATATYPE_NONE );
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Assert( m_nDataType[nAttributeIdx] != ATTRDATATYPE_4V );
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return reinterpret_cast<T *>( m_pAttributePtrs[nAttributeIdx]
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+ nX * sizeof( float )
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+ nY * m_nRowStrideInBytes[nAttributeIdx]
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+ nZ * m_nSliceStrideInBytes[nAttributeIdx]
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);
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}
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FORCEINLINE size_t ItemByteStride( int nAttributeIdx ) const
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{
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Assert( nAttributeIdx < MAX_SOA_FIELDS );
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Assert( m_nDataType[nAttributeIdx] != ATTRDATATYPE_NONE );
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return m_nStrideInBytes[ nAttributeIdx ];
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}
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// copy the attribute data from another soacontainer. must be compatible geometry
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void CopyAttrFrom( CSOAContainer const &other, int nAttributeIdx );
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// copy the attribute data from another attribute. must be compatible data format
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void CopyAttrToAttr( int nSrcAttributeIndex, int nDestAttributeIndex);
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// move all the data from one csoacontainer to another, leaving the source empty.
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// this is just a pointer copy.
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FORCEINLINE void MoveDataFrom( CSOAContainer other )
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{
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(*this) = other;
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other.Init();
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}
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void AllocateData( int nNCols, int nNRows, int nSlices = 1 ); // actually allocate the memory and set the pointers up
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// arithmetic and data filling functions. All SIMD and hopefully fast
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// set all elements of a float attribute to random #s
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void RandomizeAttribute( int nAttr, float flMin, float flMax ) const ;
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// fill 2d a rectangle with values interpolated from 4 corner values.
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void FillAttrWithInterpolatedValues( int nAttr, float flValue00, float flValue10, float flValue01, float flValue11 ) const;
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void FillAttrWithInterpolatedValues( int nAttr, Vector flValue00, Vector flValue10,
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Vector const &flValue01, Vector const &flValue11 ) const;
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};
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class CFltX4AttributeIterator : public CStridedConstPtr<fltx4>
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{
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FORCEINLINE CFltX4AttributeIterator( CSOAContainer const *pContainer, int nAttribute, int nRowNumber = 0 )
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: CStridedConstPtr<fltx4>( pContainer->ConstRowPtr( nAttribute, nRowNumber),
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pContainer->ItemByteStride( nAttribute ) )
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{
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}
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};
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class CFltX4AttributeWriteIterator : public CStridedPtr<fltx4>
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{
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FORCEINLINE CFltX4AttributeWriteIterator( CSOAContainer const *pContainer, int nAttribute, int nRowNumber = 0 )
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: CStridedPtr<fltx4>( pContainer->RowPtr( nAttribute, nRowNumber),
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pContainer->ItemByteStride( nAttribute ) )
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{
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}
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};
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#endif
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